摘要
乳砷铅铜石发现于1984年,在广西德保和平桂等矿区的硫化物型矿床的氧化带铁帽中.对该矿物的物理、化学和X射线粉晶分析、红外光谱分析以及差热分析等方面进行了测试研究,其结果与国外已知数据基本一致.矿物呈淡黄绿或深绿色,细粒状或葡萄状,硬度H=4,比重D=5.35,透明,二轴晶负光性,2V大,Ng=1.9817,Nm=1.9703,NP=1.9584.化学成分为PbO 35.19,CuO 30.64,As_2O_5 30.09,FeO 0.28,ZnO 0.05,H_2O 4.10(%).相应的化学分子式为Cu_(2.96)Pb_(1.21)(AsO_4)_(2.01)(OH)_(2.31)·0.59H_2O.X射线粉晶数据与JCPDS26～1410卡基本一政,衍射强线为3.14(10),3.24(8),2.92(8),2.55(8),2.74(7),2.49(7),2.27(7),4.51(6),4.94(5),2.66(4),1.902(4),1.817(4).计算的晶胞参数为a=10.236(?).b=5.904(?),C=14.213(?),β=106.39°,z=4,单斜晶系;空间群为A2/a.红外吸收光谱波数为3440、1640、870、820、775、465和1100、590、557(cm^(-1));差热分析吸收峰为580、773、812、889、898(℃).
Bayldonite was discovered in the gosssan of the oxidized zone of the sulphide type deposit in Debao and Pinggui mines,Guangxi. The study of the bayldonite from the physical ,the chemical ,the x-ray powder analysis,the infra-red spectra analysis and the differential thermal analysis was carried out,and the results we got are consistant with the given data abroad.
The baylonite is pale green-yellow or dark green in color and tiny grainular or grape in form,H = 4,D= 5. 35, transparent, biaxial negative, 2V large. Refractive indices Ng= 1. 9817, Nm=l. 9703,Np=l. 9584. The chemical composition are PbO 35. 19,CuO 30. 64, As2O5 30. 09, FeO 0. 28,ZnO 0. 05.H2O 4. 10 (in percentage),with the corresponding chemical formula to Cu2.96 Pb1. 21 (AsO4 )2.01 (OH)2.31 0. 59H2O. The X-ray powder data agree with JCPDS26-1410,the strongest lines are 3. 14(10) , 3. 24(8) , 2. 92(8), 2. 55(8) ,2. 74 (7), 2. 49(7), 2. 27 (7),4. 51 (6), 2. 66(5), 1. 902(4), 1. 817(4). Calculated cell dimension a = 10. 236 A ,b = 5. 904A ,c = 14. 213 A ,β= 106. 39°,z = 4,monoclinic,space group A2/a. Infra-red spectra show absorption bands at 3440,1640,870,820,775,465 and 1100,590, (cm-1). Differential thermal analysis demonstrates en-dothermal peaks at 580,773,812,889,898(℃ ).
出处
《矿产与地质》
1991年第6期459-463,共5页
Mineral Resources and Geology
关键词
乳砷铅铜石
砷酸盐
矿物
X射线
Beyldonite,Skarn sulfide deposit,Infra-red spectra analysis,Differential thermal analysis.
